<script setup>
import { User, Lock } from '@element-plus/icons-vue'
import { ref } from 'vue'
//控制注册与登录表单的显示， 默认显示注册
const isRegister = ref(false)
//定义数据模型
const registerData = ref({
    username:'',
    password:'',
    rePassword:''
})

//校验密码的函数
const checkRePassword = (rule,value,callback)=>{
    if(value===''){
        callback(new Error('请再次输入密码'))
    }
    else if(value !== registerData.value.password){
        callback(new Error('请确保两次输入的密码一样'))
    }
    else{
        callback()
    }
}
//定义表单校验规则
const rules={
    username:[
        {required:true,message:'请输入用户名',trigger:'blur'},
        {min:5,max:16,message:'长度为5-16位非空字符',trigger:'blur'}
    ],
    password:[
        {required:true,message:'请输入密码',trigger:'blur'},
        {min:5,max:16,message:'长度为5-16位非空字符',trigger:'blur'}        
    ],
    rePassword:[
        {validator:checkRePassword,trigger:'blur'}
    ]
}

//调用后台接口完成注册 点击注册时在这个函数中调用接口
import {userRegisterService,userLoginService} from '@/api/user.js'
const register = async()=>{
    //registerData是一个响应式对象 要.value获取值
    let result = await userRegisterService(registerData.value);//等待异步调用的结果
    if(result.code===0){
        //成功了
        alert(result.msg? result.msg:"注册成功");
    }
    else{
        //失败了
        alert("注册失败");
    }
}

//绑定数据 复用数据表单的数据模型
//表单数据校验
//登陆函数
import {useTokenStore} from '@/stores/token.js'//把函数导进来
import {useRouter} from 'vue-router'//useRouter是一个函数 调用函数得到路由器
const router = useRouter()
const tokenStore = useTokenStore();
const login = async()=>{
    //调用接口完成登录 异步函数
    let result = await userLoginService(registerData.value)//复用注册的数据模型 得到响应
    if(result.code===0){//状态码是0就成功
        //成功了
        alert(result.msg? result.msg:"登录成功");
        //把得到的token存储到pinia中
        tokenStore.setToken(result.data)
        //跳转到首页 路由完成跳转 路由知道哪个路径对应的是首页
        router.push('/')//跳转到/
    }
    else{
        //失败了
        alert("登录失败");
    }
}

//定义函数，清空数据模型的数据 在注册登录返回到上一级页面时清空数据
const clearRegisterData = () =>{
    registerData.value={
        username:'',
        password:'',
        rePassword:''
    }
}

//主界面
</script>

<template>
    <el-row class="login-page">
        <el-col :span="12" class="bg"></el-col>
        <el-col :span="6" :offset="3" class="form">
            <!-- 注册表单 -->
            <el-form ref="form" size="large" autocomplete="off" v-if="isRegister" :model="registerData" :rules="rules">
                <el-form-item>
                    <h1>注册</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
                </el-form-item>
                <el-form-item prop="rePassword">
                    <el-input :prefix-icon="Lock" type="password" placeholder="请输入再次密码" v-model="registerData.rePassword"></el-input>
                </el-form-item>
                <!-- 注册按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="register"> 
                        注册
                    </el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = false;clearRegisterData()">
                        ← 返回
                    </el-link>
                </el-form-item>
            </el-form>
            <!-- 登录表单 -->
            <el-form ref="form" size="large" autocomplete="off" v-else :mole="registerData" :rules="rules">
                <el-form-item>
                    <h1>登录</h1>
                </el-form-item>
                <el-form-item prop="username">
                    <el-input :prefix-icon="User" placeholder="请输入用户名" v-model="registerData.username"></el-input>
                </el-form-item>
                <el-form-item prop="password">
                    <el-input name="password" :prefix-icon="Lock" type="password" placeholder="请输入密码" v-model="registerData.password"></el-input>
                </el-form-item>
                <!-- 登录按钮 -->
                <el-form-item>
                    <el-button class="button" type="primary" auto-insert-space @click="login">登录</el-button>
                </el-form-item>
                <el-form-item class="flex">
                    <el-link type="info" :underline="false" @click="isRegister = true;clearRegisterData()">
                        注册 →
                    </el-link>
                </el-form-item>
            </el-form>
        </el-col>
    </el-row>
</template>

<style lang="scss" scoped>
/* 样式 */
.login-page {
    height: 100vh;
    background-color: #fff;

    .bg {
        background: url('@/assets/last.png') no-repeat  center / cover;

        border-radius: 0 20px 20px 0;
    }

    .form {
        display: flex;
        flex-direction: column;
        justify-content: center;
        user-select: none;

        .title {
            margin: 0 auto;
        }

        .button {
            width: 100%;
        }

        .flex {
            width: 100%;
            display: flex;
            justify-content: space-between;
        }
    }
}
</style>